Which of the following statements is a tautology?

  • A
    $((\sim q) \wedge p) \wedge q$
  • B
    $((\sim q) \wedge p) \wedge (p \wedge (\sim p))$
  • C
    $((\sim q) \wedge p) \vee (p \vee (\sim p))$
  • D
    $(p \wedge q) \wedge (\sim (p \wedge q))$

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